5.9

CVE-2015-3420: dovecot Improper Certificate Validation

CVSS: 5.9v3.0MediumModified
AliasesDEBIAN-CVE-2015-3420
Published 19-09-2017Last modified 06-08-2024
Open JSON

Vulnerability summary

CVE-2015-3420 is a medium (CVSS 5.9) Improper Certificate Validation vulnerability in dovecot. EPSS estimates a 2.84% chance of exploitation in the next 30 days, higher than 86.4% of scored vulnerabilities.

Overall risk
24/100
0100
Low · default modelHow is this calculated?
CVSS score
5.9/10
010
Medium · v3.0 (NVD)
EPSS score
2.84%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Timeline

  1. 19-09-2017
    PublishedVulnerability first disclosed.
  2. 06-08-2024
    Last modifiedVulnerability information updated.

Description

The ssl-proxy-openssl.c function in Dovecot before 2.2.17, when SSLv3 is disabled, allow remote attackers to cause a denial of service (login process crash) via vectors related to handshake failures.

CVSS metrics

3 scores · 2 sources · 2 versions

EPSS trend

Probability

2.84%

Chance of exploitation in the next 30 days

Percentile

86%

Versus all other CVEs

30-day change

0.00 pp

From 2.84% on 20-09-2026

20-09-202620-10-2026
EPSS score
2.84%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Debian1 product
  • dovecot< 1:2.2.13-12
Dovecot1 product
Fedoraproject1 product

3 vendors · 3 products

References

10 links